Yarn dyeing machine



April 16, 1940. c. H. Ross YARN DYEING MACHINE Filed April 19, 1937 4Sheets-Sheet 1 April 16, 1940. c. H. ROSS YARN DYEING MACHINE FiledApril 19, 1957 4 Sheets-Sheet 2 EMMA/I15 April 16, 1940. c. H. ROSS YARNDYEING 'MACHINE Filed April 19, 1937 4 Sheets-Sheet 3 -EMME (i/fikLiS HRoss April 16, .1940. c. H. ROSS YARN DYEING ITIACHINE Filed A ril'ie,1957 4 Sheets-Sheet 4 Patented Apr. 16, 1940 UNITED STATES PATENT OFFICEI YARN DYEING MACHINE Charles H. Ross, Hickory, N. 0.

Application April 19, 1937, Serial No. 137,806 17 Claims. (01.68-175)The present invention relates to apparatus for treating yarn, and moreespecially for the dyeing thereof.

One of the primary objects of the invention is to provide yarn dyeingapparatus which may be employed in combination with a slasher wherebyyarn may be dyed while passing through the same machine which sizes theyarn, thereby saving the time and expense of dyeing the yarn by aseparate operation, as heretofore practised.

Another object is to provide a machine wherein either the dyeingoperation or the sizing operation may be eliminated while the yarn ispassing therethrough, if such is desired,

Another object is to provide a novel and improved dyeing apparatus whichenables the yarn to be fully immersed in the dye liquor as when the yarnis travelling at the usual speed, or to be partially immersed therein aswhen the yarn is travelling at a reduced or relatively slower speed, andwhich enables the yarn to be removed from contact with the dye liquor,as when the travel of the yarn is stopped.

A further object of the invention is to provide means for automaticallymaintaining the dye liquor at a predetermined level in the dye tank andfor automatically cutting off the feed of dye liquor to the tank whenthe yarn is removed therefrom or when the travel of the yarn is stopped.

To these and other ends, the invention consists in certain improvementsand combinations and arrangements of parts, all as will be hereinaftermore fully described, the features of novelty being pointed out moreparticularly in the claims at the end of this specification.

In the accompanying drawings:

Figure 1 is a side elevation of a yarn treating machine embodying thepresent invention;

Figure 2 is a top plan view of the machine shown in Fig. l; V

Figure 3 is a side elevation, partly in section, of a yarn dyeingapparatus embodying the present invention;

Figure 4 is a top plan view, partly in section. of the apparatus shownin Fig 3;

Figure 5 is a longitudinal vertical section of the yarn dyeing apparatusshown in Figs. 3 and 4;

Figure 6 is a transverse vertical section taken on the line 8-6 in Fig.5;

Figures 7, 8 and 9 are detail views showing the automatic feed controlfor the dye liquor according to the present invention;

Figure 10 is a top plan view, partly in section, of the driving gearingof the machine; and

Figure 11 is a side elevation of a portion of the driving gearing shownin Fig. 10.

Similar parts are designated by the same ref- I5 erence characters inthe different figures.

Yarn dyeing apparatus according to the present invention may be usedseparatelyor in conjunction with other yarn. treating apparatus as maybe desired, but it is preferably combined as a unit 10 with a slasherfor sizing yarn, it enabling yarn to be dyed while it is passing throughthe slasher for sizing, and moreover such a combination enables yarn tobe not onlyv dyed and sized by the same operation but it enables yarn,to be dyed 15 without being sized or to be sized without being dyed, asmay be desired.

In Figs. 1 and 2, the dyeing apparatus according to the presentinvention is combined as a unit with a slasher of conventionalconstruction, the slasher comprising a suitable number of section beamsI mounted in a beam stand 2 for feeding the yarn to the machine, a sizebox 3 to contain the starch or other sizing material, the size boxhaving a roller 4 which is submerged in the starch or other sizingmaterial and beneath which the yarn passes, a roller 5 for guiding theyarn to said roller, and pairs of squeeze rolls 6 between which thesized yarn passes and which remove the surplus starch or other sizingmaterial therefrom. The slasher also comprises a pair of dryingcylinders .I and 8 mounted rotatably in a suitable frame 9, ti. esecylinders being hollow and having steam pipes I0 connected thereto forheating them, the yarn being threaded around the cylinder 1 and thenaround the cylinder 8 and passing around the guide rollers I0 and II toa delivery roll I2. The squeeze rolls 6 of the size box and the dryingcylinders 'I and 8 are driven at the proper surface speed to draw theyarn through 40 the machine by a shaft I3 which is connected by gearingI4 to the rolls 6 and by gearing I5 and I6 to the drying cylinders 1 and8 respectively. The shaft I3 may be driven by gearing I! from the shaftof the delivery roll I2, and the latter may be connected by a gear I8and pinion I80 to a loom beam I9 on which the treated yarn is wound. Thepinion I80, as shown, drives the loom beam from a shaft I8I on whichsaid pinion is mounted loosely, a pair of friction disks I82 being fixedto the pinion but loose on the shaft NH, and a pair of outer frictiondisks I83 are splined on the shaft I8I by keys I84 which engage in a keyslot I85 in said shaft, the outer friction disks I83 having frictionalengagement with the inner disks whereby the latter will drive the shaft|8| frictionally, and said shaft will be adjustable axially in thefriction disks. The shaft |8| drives the loom beam through a face plateI86 which is fixed on the shaft |8| and has a lug l 81 projecting fromits inner face, and a dog I88 which is clamped by the set screw I89 orotherwise fixed on the journal I90 of the loom beam. The lug |8'| on theface plate is arranged to engage the point of the dog and thereby drivethe loom beam journal, the adjacent end of said journal being engagedremovably in the end of the shaft |8| which is hollow to receive it. Theopposite end of the loom journal may be engaged removably in the hollowinner end of a supporting shaft |8| The axial adjustment provided forthe shaft |8| permits it to be adjusted for loom beams of differentwidths, and the friction drive provided for this shaft compensates forthe steady delivery of the yarn from the delivery roller |2 and theincreasing diameter of the beam as the yarn is wound thereon, therebyinsuring an even tension on the yarn at it is wound on the loom beam.The delivery roll l2 may be driven by any of the usual or conventionaldriving means employed in machines of this class, as for example throughgearing 20 from a conical pulley 2|, the latter being connected by abelt 22 to a reversely positioned conical pulley 23 whereby the speed oftravel of the yarn through the machine may be.

adjusted as desired, and the pulley 23 may be driven for example from abelt which may engage a belt pulley 24 fixed on the shaft 25 of thepulley 23, or through a pulley 26 which is adapted to drive the machineat a reduced speed, through reduction gearing 21 connected for exampleto a sleeve 26 which is fixed to the pulley 26 but is revoluble on theshaft 25, the gearing 2'! connecting the pulley 26 to the shaft 25 ofthe pulley 23, and the operation of the machine may be stopped byshifting the belt to the pulley 28 which is loose on the sleeve 26 onwhich the pulley 26 is mounted. The shifting of the belt may be effectedas usual by a belt shifter 29 which may be connected by a link 30 to acontrolling lever 3|, it being understood that when the lever 3| is inone extreme position, as for example that shown in Figs. 1 and 2, themachine will be driven at its full or normal speed by engagement of thebelt with the fixed pulley 24, that when the lever 3| occupies anintermediate position or is moved toward the right in Fig. 1, the beltwill be shifted to the pulley 26 which drives the reduction gearing 22so that the machine will be driven at a reduced speed, and that when thelever 3| is moved to'its extreme position toward the right in Fig. 1 thebelt will be shifted to the loose pulley 28 and the machine will then bestopped. Although one particular form of slasher is shown, it will beunderstood that the invention is applicable to slashers of other wellknown constructions.

The dyeing apparatus according to the present invention comprises asuitable stand which supports an open topped tank 36 adapted to containthe dye liquor, the dye liquor being supplied to this tank for exampleby gravity from a supply tank 31 which is connected by a pipe 38' to afloat controlled tank 39, the pipe 38 extending into the,

tank 39 having a valve 40 thereon controlled by a float 4| whereby thedye liquor will be maintained automatically at a predetermined level inthe tank 39. The tank 33 is connected by a pipe'42 to the tank 36 andserves normally or during the usual operation of the machine to maintainthe dye liquor at a predetermined level in the tank 36, the pipe 42being provided however with a cut-ofl valve 43, the purpose andoperation of which will be hereinafter described. The tank 36 contains aheating coil 44 through which steam or other heating medium may becirculated to maintain the dye liquor in this tank at a suitabletemperature, and a drain pipe 45 controlled by a valve 46 is providedfor withdrawing the dye liquor from the tank 36, as upon completion of adyeing operation.

According to the present invention, means is provided for passing theyarn through the dye liquor in the tank 36 to effect the dyeing thereof,such means being capable of varying the extent of immersion of the yarnin the dye liquor when the speed of travel of the yarn through theapparatus is reduced and for removing the yarn from contact with the dyeliquor when the operation of the machine is stopped or the travel of theyarn interrupted. As shown in the present instance, such means comprisesan immersion frame embodying a pair of side members 50 having a seriesof rollers 5| mounted in a horizontal row between them, these rollershaving shafts 52 which are journalled revolubly in the respective sideframe members 50, these rollers being above the top of the tank 36, anda series of rollers 53 the shafts 54 of which are mounted revolubly inbearings 55 in the lower portions of the respective side frame members50, the rollers 53 being below the rollers 5| and arranged preferably instaggered relation therewith so that the yarn :2, when threaded over therollers 5| and under the rollers 53, as shown in Fig. 5, will travel ina zigzag path. The rollers 5| function as carrier rollers for guidingthe portions of the yarn above the tank and the rollers 53 function asimmersion rollers to immerse the yarn in the bath of the dye liquorcontained in the tank, the yarn passing around the lower sides of theseimmersion rollers. A series of squeeze rollers 56 are preferablyprovided to cooperate with the respective carrier rollers 5|, the shafts51 of the squeeze rollers resting in vertical slots 58 formed in therespective side frame members 50, the squeeze rollers resting on theyarn passing over the respective carrier rollers 5| and functioning tosqueeze the yarn as it comes from the dye bath and thereby force the dyeliquor into the yarn and remove the surplus liquor therefrom. Thecarrier rollers 5|, immersion rollers 53 and squeeze rollers 56 are allfreely revoluble in the frame, the yarn being pulled through the dyeingapparatus by the rollers 6 in the size box and the drying cylinders Iand 8 which are driven for example in the manner hereinbefore described.

The dyeing apparatus may be constructed with any desired number ofcarrier, immersion and squeeze rollers, and the present inventionenables any desired number of immersion rollers contained in the machineto be set in operative position to vary the dyeing effectupon the yarn.As

shown in the present instance, the bearings 55 carrying the immersionrollers 53 are adjustable vertically in guiding slots 60 formed in therespective side frame members 50 so that the immersion rollers areindividually adjustable vertically in the frame, and the bearings foreach immersion roller are provided with screws 6| mounted vertically androtatably in bearings 82 at the respective sides of the frame, thesescrews being threaded into the bearings at the ends of the respectiveimmersion roller and' being provided at their upper ends with means forrotating them in 75 unison whereby both ends of the respective immersionroller will be evenly raised or lowered.

The means shown in the present instance for ro-' tating the screwscomprises a bevel gear 63 fixed to the upper end of each screw, a crossshaft 64 extending across and rotatably mounted in the side framemembers 50, and bevel gears 65 fixed on the shaft 64 and cooperatingwith the bevel gears 63 fixed to the screws. The outer end or ends ofeach shaft 64 may be of square or other suitable formation as indicatedat 66 to receive a crank or wrench for rotating the shaft. By thisconstruction, any one or more of the immersion rollers may beindividually adjusted vertically in the frame. For example, if the shadeis running heavy,one or more of the immersion rollersmaybe raised, byoperating the respective shaft or shafts 64 to remove such immersionroller or rollers from the dye bath so that the yarn in passing aroundsuch roller or rollers will not be submerged in the dye bath or theheight of one or more of the immersion rollers may be adjusted to varythe depth to which the yarn is immersed in the dye bath while passingaround such immersion roller or rollers. The adjustments thus providedfor the immersion rollers enable the yarn to be dyed to the desiredshade without necessitating changing of the dye liquor in the tank, itbeing understood that by lowering theimmersion rollers in the frame theyarn will travel fora greater! distance through the dye bath andconsequently will be submerged in the dye bath for a longer period oftime than when the immersion rollers are set at higher levels and thatadjustment of one or more of the immersion rollers to its raised orinoperative position so that the yam passing around such roller orrollers will not be submerged in the dye bath will cause the yarn to bedyed to a lighter shade since the period of time during which the yarnis submerged in the dye bath will then be reduced. The yarn may beguided into the dyeing apparatus between the rollers and 56 at one endof the immersion frame by a guide roller 61 which may be journalled torevolvefree- 'ly on a bracket 68 supported on the stand 35, the

roller 61 receiving the yarn from the section beams, and the dyed yarnis delivered from the dyeing apparatus between. the rollers 5| and 66 atthe other end of the immersion frame to the guide roller 5 on the sizebox 3.

Means is provided for relatively adjusting the immersion frame and dyetank 36 to set these parts into and out of operative relationship fordyeing and for varying the depth of immersion of the immersion rollersin the bath of dye liquor. Preferably and as shown in the presentinstance, the immersion frame with its carrier, immersion and squeezerollers, is adjustable vertically with respect to the dye tank 36. andmeans is provided for guiding the immersion frame and for. evenlyadjusting it vertically with respect to the dye tank. Such means asshown in the present instance comprises a pair of vertical rack barsfixed in parallel relation to the outer side of each frame member 50, apair of shafts 'I 'journailed in bearings I2 fixed on each side of thedye tank 36, and pinions I4 are fixed on the shafts H and mesh with therespective rack bars ill at opposite sides of the immersionframe, itbeing understood that four rack bars III are provided on the immersionframe and four pinions 14, two of which are located at each side of theimmersion frame, mesh with the rack bars. Means'is provided for rotatingall of the shafts 1| in unison whereby the immersion frame will beraised or lowered evenly at its ends as well as its sides, such meanspreferably comprising pairs of pulleys of equal size, a pair of thesepulleys being fixed on the shafts H at each side of the immersion frame,and chains, cables or other flexible members I6 which are fixed to theperipheries of the respective pairs of pulleys-and are adapted to bewound thereon and unwound therefrom. The weight of the immersion frameand the various rollers thereon is preferably counterbalanced by a pairof weights l'l suspended from the chains or cables 16 at each side ofthe machine, these weights acting to tension the chains or cables andthereby balance the weight of the immersion frame and reduce the amountof power required to lift the immersion frame and allow it to be liftedand lowered freely. The chains or cables 16 are operated to rotate allof the shafts simultaneously to raise or lower the immersion frameevenly by a bell crank lever 18 which is 1 fixed on a shaft 19 mountedrotatably in the stand and extending across the machine, said bell cranklever having an arm 80 which is attached at 8| to the lower ends of thechains or cables 16 at one side of the machine, and the shaft '19 havinga similar arm fixed to its other-end and attached at 8| to the lowerends pinions H thereon in directions to raise the immersion frame intothe inoperative position shown by the dotted lines in this figure, theimmersion ro1lers'53 being then removed from the bath of dye liquor inthe tank.

The bell crank lever 16, according to the present invention, is operatedautomatically by the control lever 3| which controls the driving of themachine, the arm 82 of the bell crank lever being connected by a rod orlink 83 to the lever 3| so that-when the lever 3| is set'in the positionshown in Figs. 1 and 2 for the running of the machine at its normal orfull speed by the engagement of the driving belt withthe fixed pulley24, the bell crank lever 18 willoccupy' the full line position shown inFig. 3 and the immersion frame will then be in its lowered operativeposition with the immersion rollers 53 fully immersed in the dye liquorin the tank 36. When the lever 3| is moved to an intermediate position,so that the machine will be driven at a reduced speed by engagement ofthe driving belt with the pulley 26, the bell crank lever will occupy aposition intermediate the full line and dotted line positions shown inFig. 3 and the immersion frame will then be partially lifted from thedye tank 36 and the immersion rollers 53 will be partially immersedtherein. When the lever 3| is moved to the right in Figs. 1 and 2 sothat the driving belt engages the loose pulley 28, the operation of themachine will be stopped, and the movement of the lever 3| into stoppingposition shifts the bell crank lever 13 to the dotted line positionshown in Fig. 3, thereby lifting the immersion frame and removing theimmersion rollers 53 from the bath of dye liquor in the tank 36. Theautomatic control thus provided between the driving mechanism of themachine and the immersion frame enables the dyeing operation to proceedin the normal manner with the immersion rollers fully immersed in thedye bath while the machine is operating at its normal full speed, andwhen the speed of operation of the machine is reduced for example toone-half speed, the immersion frame is automatically lifted .to a heightwhere the immersion rollers are partly immersed in the dye liquor, thusreducingthe extent of travel of the yarn through the dye bath and hencereducing the period of time the yarn is immersed in the dye bath andconsequently compensating for the reduced speed of travel of the yarn.The partial immersion of the immersing rollers in the dye liquor whilethe machine is operating at reduced speed avoids excessive penetrationof the dye liquor into the yarn and 'thus enables the dyeing of the yarnto be continued without changing the shade, or substantially so. Byautomatically lifting the immersion frame and thus removing theimmersing rollers completely from the bath of dye liquor when themachine is stopped, dyeing of the yarn to heavy shades is avoided.

The present invention also provides means for automatically controllingthe feed of the dye liquor to the dye tank 36 whereby when the immersionframe is lifted completely out of the dye bath, as when the machine isstopped, the feed of dye liquor to said tank will be cut off. Thisautomatic control is efi'ected by a link connection between the bellcrank lever 18 and the operating arm 85 of thejeed control valve #83.The valve 43 may be of the conventional rotatable plug type having arotatable plug member 81 provided "witha diametric port 88 extendingtherethrough.

the bell crank lever is swung into the dotted line position shown inFig. 3 and the immersion frame is in its raised or inoperative positionand the immersion rollers 53 are removed from the bath of dye liquor,the valve 43 will be closed as shown in Fig. 9, thereby cutting off thefeed of dye liquor to the tank 36 and thus avoiding an excess supply ofdye liquor thereto.

The construction and mode of operation of the different parts of theapparatus having been hereinbefore described in detail, the generaloperation of the apparatus is as follows: The yarn to be dyed issupplied to Qie machine from the section beams i, it being threadedbetween the carrier rolls 5| and squeeze rollers 56 and successivelybeneath the immersing rollers 53 in the manner shown in Fig. 5, afterwhich the yarn passes beneath the immersing roller 4 in the size box 3,then between the squeeze rolls 6 to the drier, passing around the dryingcylinders I and 8, thence around the guide rollers l0 and H and aroundthe delivery roll 12 and the treated yarn being wound on the loombeam'or section beam 89 or it may be wound on quills or put up in chainwarp or ball warp.

When the machine is operated at its normal full speed, the setting ofthe control lever 3! fordye liquor feed valve 43 is open as shown inFig. 7 so that the float controlled valve 40 in the float tank 39 maymaintain the dye liquor at a predetermined level in the dye tank 36,supplying dye liquor to replace that taken up by the yarn.

If the control lever 3i is set in a position for operation of themachine at one-half or other reduced speed, the bell crank lever it willbe swung to an intermediate point in its range of movement as shown inFig. 8, thereby lifting the immersion frame partially from the dye tank36 and partially removing the immersing rollers 53 so that they will beonly partially immersed in the bath of dye liquor, thereby reducing theperiod of time the yarn is submerged in the dye bath and therebycompensating for the reduced speed of travel of the yarn and enablingthe dyeing of the yarn at an even shade to be continued. While themachine is thus operating at one-half or reduced speed, the dye liquorfeed valve 43 will still be open as shown in Fig. 8 so that the floatvalve 40 may automatically maintain the dyeliquor at a predetermined orconstant level in the dye tank 36, dye liquor. being fed to the dye tankto replace that taken up by the yarn.

When the control lever 3i is moved into a position to stop the operationof the machine, the bell crank lever 18 is swung into the dotted lineposition shown in Fig. 3, thereby lifting the immersion frame from thetank 36 and completely removing the immersing rollers 53 from the bathof dye liquor therein, thereby interrupting the dyeing operation andpreventing the yarn from being dyed to an unduly dark shade during thestoppage of the machine. At the same time, the dye liquor feed valve 43will be completely closed, thereby avoiding the supply of an excessamount of dye liquor to the tank 36, as would otherwise occur due to thelowering of the level of the dye liquor in the tank due to thewithdrawal of the immersion rollers and lower portions of the immersionframe therefrom.

In order to accelerate the lowering of the level of the dye-liquor inthe tank 36 when the immersion frame is raised as for slow speed orstopping of the machine, a displacement block 90 having an outwardlyinclined inner face is preferably mounted in each end of said tankbetween and clear of the side members 50 of the immersion frame, in theregion of the level of the dye liquor in the tank. These blocks may besupported in the respective ends of the tank by brackets 9! attached tothem and supported on the upper edge of'the tank by thumb screws 92 sothat the blocks may be adjusted vertically as desired but when adjustedthey remain in fixed position. By the use of these blocks, when theimmersion frame is raised in or withdrawn from the dye liquor, the levelof the dye liquor By combining the dyeing apparatus with a slasher, asherein shown and described, yarn may I be dyed and sized at the sameoperation or during a single passage of the yarn through the onemachine, thereby saving the time and expense of performing the dyeingoperation separately. If it is desired to dye the yarn without sizingit, the yarn may be led directly from the dyeing apparatus to the dryingcylinders, and if it is desired to size the yarn without dyeing it, theyarn can be led across the top of the dyeing apparatus directly to thesize box. In either case, the yarn delivered from the machine will be inproper dried condition and when the yarn is dyed and then sized in thesame machine, the drying cylinders serve to dry the dyed and sized yarn.

I claim as my invention:

1. In a machine having means for advancing yarn therethrough and. havingmeans for operating it at different speeds, yarn dyeing apparatusadapted to contain a bath of dye liquor for travel of the yarntherethrough duringits advance, and means controlled automaticallyaccording to the speed of operation of the machine for varying thelength of the path of travel of the yarn through the bath.

2. In a machine having means for advancing yarn therethrough and havingmeans for "operating it at different speeds, yarn dyeing apparatusadapted to contain a bath of dye liquid for movement of the yarnsubstantially vertically therethrough while immersed therein, and meansfor varying the depth of immersion and thereby varying the length of thepath of travel of the yarn in said bath automatically according to thespeed of the machine.

3. In a machine having means for advancing yarn therethrough and havingmeans for varying it and for stopping its operation, yarn dyeingapparatus adapted'to contain a bath of dye liquor for movement of theyarn therethrough while immersed therein, and means controlled by saiddriving means for automatically removing the yarn from said bath whenthe operation of the machine is stopped.

5. In a machine having means for advancing yarn therethrough atdifferent speeds and for stopping its advance, dyeing apparatus tocontain a bath of dye liquor through which the yarn is adapted toadvance while immersed therein, and means operative automatically tovary the length of the path of travel of the yarn in said bath inaccordance with variations in the speed of advance of the yarn and forremoving the yarn from said bath when the operation of the machine isstopped.

6. In a machine having means for advancing yarn therethrough and forstopping its advance, dyeing apparatus to contain a bath of dye liquorthrough which the yarn is adapted to advance while immersed therein, dyeliquor feed means for normally maintaining the dye liquor at apredetermined level in said bath, means operative automatically toremove the yarn from said bath when the operation of the machine isstopped, and means operative automatically to cut off the dye liquorfeed to said bath when the operation of the machine is stopped.

7. In a machine having means for advancing yarn therethrough and meansfor driving the machine at different speeds and for stopping it, dyeingapparatus to contain a bath of dye liquor through which the yarn isadapted to advance while immersed therein, means for varying the extentof immersion of the yarn in said bath and for removing it therefrom, dyeliquor feed means for normally maintaining the dye liquor at apredetermined level in said bath, and means controlled automatically bythe driving means for varying the extent of immersion of the yarn insaid bath according to the speed of advance of the yarn and for removingthe yarn from the bath and cutting on the dye liquor feed when theoperation of the machine is stopped.

8. Dyeing apparatus comprising a tank to contain a bath of dye liquor,driving means for advancing yarn through the apparatus at difl'erentspeeds and for stopping its advance, controlling means for'said drivingmeans for controlling the speed and the stopping of advance of the yarn,and yarn guiding means for immersing the yarn in and directing itthrough said bath, said tank and guiding means being relatively movablevertically under control of the controlling means for said driving meansto immerse the yarn to varying extents in said bath and to remove theyarn therefrom.

9. Dyeing apparatus comprising a tank to contain a bath of dye liquor,and a frame carrying rollers for guiding the material to be dyed, saidtank and frame being relatively movable vertically to immerse and removethe yarn with respect to the bath, means for feeding dye liquor to thebath, and means operative to cut of! the dye liquor feed when said tankand frame are relatively moved vertically to remove the yarn from thebath.

10. Dyeing apparatus comprising a tank to contain a bath of dye liquor,driving means for advancing the material to be dyed, a frame carryingrollers for immersing the material to be dyed,

'said frame having means for moving it vertically to carry said rollersinto and out of immersing relation with a bath of dye liquor in thetank, and means common to said driving means and frame moving means forcontrolling the movement of said frame according to whether the drivingmeans is placed in or out of operation.

11. Dyeing apparatus comprising a tank to contain a bath; of dye liquor,a frame carrying a series of rollers for immersing in the bath thematerial to be dyed, said frame being movable vertically to carry saidrollers into and out of immersing relation with a bath of dye liquor inthe tank, and means for individually adjusting at least one of saidrollers vertically relatively to the other rollers of the series.

12. Dyeing apparatus comprising a tank to contain a bath of dye liquor,a frame carrying a substantially horizontal series of rollers forimmersing the material to be dyed, mid frame being movable vertically tocarry said rollers as a unit into and out of immersing relation with abath of dye liquor in the tank, pairs of racks secured unison, and meansfor individually adjusting I some at least of said rollers vertically insaid frame relatively to the other rollers.

13. Dyeing apparatus comprising a tank to contain a bath of dye liquor,a frame carrying rollers for immersing the material to be dyed, saidframe being movable vertically to carry said rollers into and out ofimmersing relation with the tank, pairs of racks secured to oppositesides of said frame, shafts extending transversely of the frame andhaving pairs of pinions thereon meshing with said racks, pulleysconnected to said shafts and. having flexible members adapted to windthereon, a counterbalance for the frame suspended fromv said flexiblemembers, and means connected to said flexible members for operating themto rotate said shafts.

l4. Dyeing apparatus comprising a tank to contain a bath of dye liquor,a frame carrying rollers for immersing the material to be dyed, saidframe being movable vertically to carry said rollers into and out ofimmersing relation with the tank, dye liquor feed means connected to thetank and provided with a cut oiT valve, and means for raising andlowering said frame to carry the rollers thereon into and out ofimmersing relation with the bath of dye liquor in the tank, said meansbeing connected to said cut oil valve and operative to close it whensaid frame is raised.

15. Dyeing apparatus comprising a tank to contain a bath of dye liquor,a frame carryinga series of rollers for immersing the material to bedyed in said bath, some at least of said rollers being individuallyadjustable vertically in said frame to set them in non-immersingrelation with said bath while others of said rollers are in immersingrelation therewith.

16. Dyeing apparatus comprising a tank to contain a bath of dye liquor,a frame carrying rollers for guiding the material to be dyed, means forrelatively moving said tank and frame vertically to immerse and removethe material with respect to the bath, and means for accelerating thelowering of the level of the dye liquor in the tank when the material isremoved therefrom. i

17. Yarn dyeing apparatus comprising a tank to contain a bath of dyeliquor, a frame carrying rollers for guiding the yarn to be dyed, meansfor relatively moving said tank and frame vertically to vary the extentof immersion of the yarn in the dye liquor, and displacement means forconstricting the area of the tank in the region of the level of the dyeliquor therein.

CHARLES H. ROSS.

